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Mortgage Loans Held For Investment And Related Assets (Schedule Of Credit Quality Indicators) (Details) (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2013
Apr. 30, 2013
Oct. 31, 2012
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio $ 306,103 $ 350,235 $ 385,867
Occupancy Status, Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 212,957    
Occupancy Status, Non-Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 93,146    
Documentation Level, Full Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 152,995    
Documentation Level, Limited Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 19,156    
Documentation Level, Stated Income
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 111,247    
Documentation Level, No Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 22,705    
Internal Risk Rating, High
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 53,679    
Internal Risk Rating, Medium
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 121,887    
Internal Risk Rating, Low
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 130,537    
Purchased From SCC
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 175,566    
Purchased From SCC | Occupancy Status, Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 128,932    
Purchased From SCC | Occupancy Status, Non-Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 46,634    
Purchased From SCC | Documentation Level, Full Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 57,821    
Purchased From SCC | Documentation Level, Limited Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 5,744    
Purchased From SCC | Documentation Level, Stated Income
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 97,591    
Purchased From SCC | Documentation Level, No Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 14,410    
Purchased From SCC | Internal Risk Rating, High
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 53,679    
Purchased From SCC | Internal Risk Rating, Medium
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 121,887    
Purchased From SCC | Internal Risk Rating, Low
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio       
All Other
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 130,537    
All Other | Occupancy Status, Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 84,025    
All Other | Occupancy Status, Non-Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 46,512    
All Other | Documentation Level, Full Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 95,174    
All Other | Documentation Level, Limited Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 13,412    
All Other | Documentation Level, Stated Income
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 13,656    
All Other | Documentation Level, No Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 8,295    
All Other | Internal Risk Rating, High
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio       
All Other | Internal Risk Rating, Medium
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio       
All Other | Internal Risk Rating, Low
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio $ 130,537